Lost Sierra Endurance Race

The Lost Sierra Endurance Race, held in Downieville, California, offers a challenging and scenic trail running experience through the Sierra Buttes. Scheduled for July 26, 2025, the event features three distances: 25K, 50K, and 100K. The 100K is an out-and-back course starting in downtown Downieville, passing through rugged single-track trails and multiple aid stations, with significant elevation gain of over 10,700 feet.

The 50K is a point-to-point route from Plumas-Eureka State Park to Downieville, featuring rocky and smooth trails with two major climbs. The 25K is a looped, less demanding course through river canyons. The race emphasizes community with aid stations, crew access points, and a post-race BBQ. Visit the organization's website for the most recent information.